13
REAR GEAR ASSEMBLY
Pull off spacer
59
.
Grip ring gear
63
and tap out the internal assembly from the front end.
Remove two bearings
21
and spacer
61
from planet gear spindle
20
.
Push out two planet gear shafts
23
and slide out two planet gears
22
complete with needle bearings
60
.
Press needle bearings
60
out of planet gears
22
.
Remove retaining ring
62
from ring gear
63
.
Assemble in reverse order to dismantling.
MOTOR ASSEMBLY
(Previously removed)
Remove locating pin
28
.
Grip front end plate
25
by hand and tap the splined end of rotor
57
with a soft hammer so as not to damage the splines and remove
the front end plate and bearing assembly from the rotor .
Remove rotor cylinder
26
complete with the two locating pins.
Remove five rotor blades
27
from rotor
57
.
Support rear end plate
55
in a tube with a bore diameter as close as possible to the largest diameter of the rotor
57
and tap the
non-splined end of the rotor
57
to remove it from the rear end plate and bearing assembly.
With a punch tap out bearing
54
from rear end plate
55
and bearing
58
from front end plate
25
.
Assemble in reverse order to dismantling, ensuring the following:
The locating pin correctly locates the motor assembly to the backhead assembly before screwing on the motor housing.
Front end plate
25
and rear end plate
55
that abut the rotor cylinder
26
are clean and free from burrs and surface marking. If
necessary, lap faces that abut the rotor cylinder on a flat fine grade of abrasive paper. Press bearings into front and rear end plates
25
&
55
.
Support the bearings in the rear end plate
55
on its inner ring and tap the rotor on its splined end with a soft hammer into the bearing
until the rotor locates against the rear end plate.
Support the inner face of the end plate as close as possible to the largest diameter of the rotor
57
and tap the non-splined end of
the rotor until a clearance of 0.040 mm (0.0015 in) / 0.065 mm (0.0025 in) is obtained between the inner face of the rear end
plate and the rotor.
This clearance is to be checked when pulling the rotor away from the rear end plate and bearing assembly.
Spin the rotor to ensure that it will rotate freely in the rear end plate bearing.
Locate the rotor cylinder by the locating pin to the rear end plate, checking that the ports in the end plate match with those in the
rotor cylinder.
Insert the five rotor blades into the rotor and locate correctly the front end plate to the rotor cylinder using the locating pin.
Ensure that the rotor will spin freely in the assembly. This is best checked by placing the motor assembly in a vee block and
squeezing the front and rear end plate against the cylinder.
I M P O R T A N T
Check the tool against daily and weekly servicing.
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
